Circuit-closer.



H. E. McKEE.

CIRCUH CLOSER.

APPLICATION FILED ram/.15. ma.

l'utcntod Dec. 16,1919 2 suns sum 2 o P Centrally connected with said dijaphrafim 5 check valve 421ml between.

mfildevice is attached tube, there sup rt 52 which support is screw-mounted w be constant communication between the on sk 37. interior of the and the interior of the pneumatic tire;

The. die hragm 36 made preferably of ver 51. hardened recs, is securel by the" If the tireshould for any reason leak so threaded disk .87 which dishedgon the as to lower the pressure within, it is clear lower face to allow formovment of a dmthat the end 51" of lever 51 will be gradually movedoutwardly throu h the slotted openv mg22-(es shown dot in Big. 2) by means means of the screw88, is-a vertica y, of the pm 58 moving the pivoted end 51 .inovable, tubular member 89 provided with downwardly.

interior bore 40 with-the upper enlarged The electric si a1 co portion 41conta' the common form of electric .li 'h t b comprises the valve an automo lle, may be mounted on the dash seat *8 and the valve 44 mounted on stem and connected 85. The :valve normally closed by means each one of tour switc cs 57 which are of the expansion'springdliwhich is confined rigidl ,monnted on the strap supports 58 theve 44 and'the metal and 9 which are secured to, respectively, Ouldflll lfii? iswell nnderstood theistem' the front and rear wheel supports. The support 58 (shown dotted in attached to the movable .por-

Apin 53 is secured within the portion 47 and extends through-the slot 54 of the lerises an ordinary projects normal ,ilittle abovetheorifice; front switch 11%: screw 38 isprovlded Fig. 6 be lor terminal 89. 15

with a longitudinal bore to afford constant tion 0 the. i ht wheel steering knuckle, so

-- communication the interment-um as tomaintain a fixed relative eumatic tire 5.40, as clearly the lateral movement ofthe whee hown inFigfl -j :T":'" r- A complete electric circuit between the An; enlargediportions-ll' on the, bulb 55 and each switch 57 may be made by exteribrlowe'rfpart' oithe tubular -n embe the end 51 of leverfil'coming into engage- 39 forms a'. seat. fore. coiled spring 48; the ment with the extending switch arm 60 upper end of which abuts a 'tlreadarrangedwlthm its path at the lowering justing thumb screw 49 which. .g screwed .of the pressure within any one of the tires. connection within the disk disk The construction of switch 57 includes the -is screw-connected within .part of back 61, a-pair of binding posts 62 and consition to the cylindrical member 22. tact points 63,- Rigidly mounted on shaft The adi'ust' thumb screw 49 is provided 64, one end of which-is sup rted within the with a central reto fit and do the tuback 61 andcover 65 and t e operating end bular member 89in its vertica movement, of which is r1 'dly connected with the switch and is so arranied that by turning the screw arm 60, as a s eeve 66 of insulating material, 49 in orout, espring 48 is more or less su portmfiea contact late 67. a com and the pressurc'pf'the valve twlll u n rstood then, t at normally, mem er.89 on the diaphraglm 36 is varied," .the end 51 :of-lever- 51 will not engage the thereb affording a. variab e point of ex-. ermtlh-but when the'pressure in any tire haust or the valved t. asloweredtoa certain predetermined lower The illustrations show the dev ce in a con pressure, thegmovable; valve tube 39 will dition with air pressure within the d1a-" .mWe-thelevereod 51foutwardly, (as shown phragm chamber and with the stem 85 a. .k'iottcd 'ml lgajt) into ent with-the short distanee from the mside ofjthejtop of I :arni'BO, thereby-rotating s aft 6* and the cap 24 It.1s' obv ous, that when the plat-e67 to complete the.cirsure within the t and diaphragm a, hat. mthfpojiibs 63. to light the electric bulb exceeds a certain point. 155,.- Anisuitab safety, which is controlled bysal 'ad ust-.- use battery, be provided. The" spring screw 49 and* sp 48,;the pressureuaction of plateretains-the plate in againstjhe diap 36 will continue to stant cqntactiuntil the tire pressure is raised nuse thejtubular'va ve member 89 until the and 60 moved to normal position by valve stein 35 the. under side of the the operator, thereby the circuit. cap 24 and-th y displaces-the valve 44 It 1e thought that the i ustrat'ion and to relieve the tire of the'exoessive pressure foregoing description of construction and i exhaust same through the openings 50* operation will be clearly understood, therein disk 50 and outthrough the slot 22+ in fore, a more extended explanation is omitted. w a

the wall 22cm V The low-pressurels are operated by means of an S-she lever 51 having a the combination of a body, a vertically movlower fixed-end plvotallymounted in the -able member, a it I claim as my invention:

by a air of wires 56 55 which, in the case of- 1e source 9f electric power,

In a circuit closer of the kind described,

gin restrained and its central portion con- 111 body when the saidg -lever and- 'pm'tlen of said lever pressure belmifl said die )hragm is lowered, said lever when in silk projected position being adapted to c ierate an electric switch.

In witness whereof, I have hereunto subscribed my name this 12th day of November, 1915.

RAYMOND E. MQKEE. 

